Diestock



I. W. NONNEMAN.

DIESTOCK.

APPLICATION FILED JAN.14, $92! 2 SHEETS-SHEET. l.

Patented June 6, 1922,.

TENT .QFEJQE...

IRA W. NONNEIVIAN, OF WARREN, OHIO, ASSIG-NOB TO TIIE BURDEN COMPANY, OF

WARREN, (JR-I0, A CQRPOBATION OF OHIO.

DIESTOCK.

Specificationof Letters Patent.

Patented June 6, 1922.

Application filed. January 14, 1920. Serial No. 351,463.

ried by member or frame removably extending into a handle-frame or drlving member which carries a (pawl coacting with teeth on the chaser-carrying member. The general object of the invention is :to simplify and cheapen the construction of such die stocks. More specifically an object is to so construct :the pawl and chaser carrying frame that the latter will be normally held by the pawl itself against removal from the handle frame, or may be removed whenever desired by simply releasing the pawl. An-

other ob'iect is .to provide for effectively holding the chaser by means which will enable its ready removal. The invention 1s hereinafter more fully descrlbed 1n connection with the drawings showing a preferred embodiment of it, and the essential characteristics are summarized in the claims.

In the drawings Fig. 1 is an end view of my diestock 'lookingat-the end .distant from the Chasers; "Fig. 2 is a side elevation of the die stock; Fig. 8 is an end view looking at the chaser end of the .die stock; Fig. t is a cross section [through the pawl-carrying frame, as indicated by the line 44 in Fig.

' 2, this view showing the pawl in the position it has when the pawl frame is moving backwardly across the tooth to be engaged and fed; Fig. is a 'longitur'linail cross .section as indicatedby the line5-5 in 1 {Fig 6 is a fragmentary cross section in the same plane as Fig. 4, showing-die stock in feeding engagement with one of the teeth of the chaser frame; Figs. 7 and 8 are details showing the means for locking the Chasers in place, being cross sections substantially on the lines 7-7 and 8-8 in Fig. 3.

In the drawings, 10 indicates the chaser carrying member or frame which is composed of an annular head, portion carrying tension 11 is preferably of reduced inter- .nal and external diameter from the chaser carrying portion, the interior of the sleeve 11 constituting the pipe guide. I

The chasers,designated-20, are carried :in radial notches in the head 10 and locked in place longitudinal pins 35 which ha-ve a drive lit in the frame and freely occupy holes 22 in the edges of the Chasers, :and by .an armular clamping'plate '30, which has -on its inner face an annular rib -31 occupying notches 21 in the chasers and an annular groove in the face'of the head 10. This rib efiectively positions the ring, which is :held to the frame in a suitable manner as by screws 32. The chaser-s are thus engaged at their inner and .outer edges and effectively locked in place but maybe readily released for changing ?by simply removing the ring.

The outer face of the sleeve 11 of the chaser frame is provided with equi-distant longitudinally extending teeth 14;, which have their walls lying substantiallyradially.

Surrounding the teeth 14 is the driving frame 10, the inner edgeof which preferably abuts the shoulder 15 where the zreduced sleeve 11 leaves the head 10 of the chaser frame. The other edge ofthe-d-riving sleeve may be flush "with thesleeve -11. This'dri-v- .ing sleeve carries a radial vsocket 4-1 from which extends the operatinghandle -42, partly shown in the drawings, by which-the frame 'may be oscillated.

Adjacent to the socket 41 is another radial socket 43, .and in this'is mounted .a paw-1'50 adapted to \coact with the-teeth '14:. The pawl has a shank 5-1 extending outwardly through an opening in the end of the socket 43 which is otherwise closed at the outer end. Surrounding this shank is a helical spring .53 compressed between the end of the socket and pawl. A suitable headoinknob is secured to the end of the shank 51.

The inner end of the pit-v1 50 is peculiarly formed, its forward inner corner being rabbeted .to provide a tooth 56 having a radial face and adapted to engage the radial face of any tooth 141, while .at the rear of this radial face .56 is anrinclined surface 57. on the backward movement of the pawl carrier this surface 57 engages the edge of the tooth 14 just behind the one which has been \engaged and this cams the pawl outwardly .so that it rides freely over the tooth as shown i in Fig. 4 and then drops into place behind as shown in Fig. 4. v

Y inclined end 57 of the pawl a wing 58which constantly occupiesthis groove.v The groove in reality consists of a series of aligned notchesthrough thesuccessive teeth, but, in

effect it is an annular groove though successively interrupted. The wing 58 extends in the circumferential direction farther than the distance between teeth and extends inwardly beyond the point 56 so' that, in normal operation, it is always in engagement with the sleeve 11, whetherthe pawl be in its feeding position, as shown in Fig. 6, or is passing backwardly across the top ofa tooth,

To release the chasercarrying frame, it is only necessary to pull the pawl outwardly beyond any of its normal positions, thus causing the wing :58 to entirely clear the groove 17 enabling the chaser sleeve to be freely drawn out. The wing serves the purpose of normally holding the two frames'together and also prevents the pawl being rotated out i of position. When desired to reverse the direction'of rotation it is only necessary to draw the pawl well out and turn it half way around and allow it to return.

It will be seen that my die stock is very simple in construction. The two frame members may readilybe each an integral casting. The chasers are firmly heldto the chaser frame "by the ring. 30 held by its screws. The pawl shank may be readily rigid with the pawl head, the'shank after being put in place through the spring and the end of the socket beingrivetedto the pawlhead- 55.

No other means are necessary for holding the pawl and spring in place. The-simpleprovision ofcthe annular groove and the wing onthe pawl effectively locks the two frames together but enables their immediate release whenever desired.

Iclaim:'- 1. A. combination of a chaser carrying frame, a driving frame, teeth on one of said frames, a pawl carried by thev other frame adapted to engage the teeth, and means whereby said pawl normally prevents separation of the two frames but allows such separation when desired.

I 2 In a'die stock, the combination with two I 7 frames mutually rotatable, afchaser carried by one ofthe frames, and a pawl carried by the other and adapted to engage teeth on the chaser frame,-said pawl having a projectlon normallyoccupylng a groove in the chaser frame.

3. In a die stock, the combination of a chaser-carrying frame having a sleeve por-' tion with external teeth, a driving frame surrounding said teeth, there being an annular interrupted groove across the teeth and a pawl carried by the driving frame having a projection normally occupying said groove.

4. In a chaser carrying frame, having a sleeve wlth external longitudlnal teeth, a driving frame rotatably surroundlng said teeth and having a soclret,'a pawl mounted in said socket, and

a spring pressing said pawl inwardly, said pawl having a tooth adapted to engage the teeth on the chaser frame,said pawl having also a wing at its inner end normally occupying a groove extending across the teeth.

5. The combination of a chaser-carrying frame having a reduced sleeve portion with external longitudinal teeth formed on it,

a driving frame surrounding said'teeth and abutting the shoulder provided by the reduc tion in external diameter of the sleeve portion, a pawl carried by said driving'frame and adapted at its inner edge to engage said 7 teeth', sa id pawl having a projection .adapted to engage a groove formed across, the teeth:

of the said sleeve. 7

6. The combination-of a chaser carrying frame, with longitudinal teeth, an oscillatoryframe surrounding said teeth, a'pawl carried by the" latter frame and adapted to engagefand feed the teethor be forced outwardly on backward movement, said pawl having a wing and there being notches across the teeth in a position to form an interrupted annular groove occupied by the wing, said wing extending circumferentially to a greater distance than the space between adjacent teeth on the chaser-carrying frame.

, 7. The combination of a chaser carrying carried by the latter frame, said pawl hav ing an abrupt face adapted to engage and feed the teeth and-an inclined portion at the .rear of theface adapted to engage the outer corner of the adjacent tooth and thereby a wing formed on itsinner face and projecting inwardly therefrom, and there being notches across the teeth in a position tobe occupied by the wing, said wing-extending inwardly beyond the point of the pawl tooth whereby it may engage the chaser frame tooth which the pawl tooth is clearing. I

8. The combination with driving means of a chaser-carrying frame with notches in it, chasers occupying said notches, said head having an annular groove in its edge and the die stock, the combination of a frame having longitudinal teeth, an oscillatory frame surrounding said teeth, a pawl cam the pawl backwardly, said pawl having chasers having notches registering With said groove, and a clamping plate secured to the head covering the edge thereof and having on its inner side a rib occupying said groove and notches.

9. A chaser frame having a head With a notch, a chaser occupying said notch, there being a groove formed on the edge of the head, a notch across the chaser in registration with said groove, a clamping member having arrib occupying the groove and the notch in the chaser, and means for holding the clampingmemher to the head.

10. A chaser frame'having a head With notches, chasers occupying said notches, there being agroove formed on the edge of the head, notches across the chasers in registration with said groove, a clamping ring having a rib occupying the groove and the notches in the Chasers, and pins carried by the chaser frame and occupying holes in the inner edges of the chasers. V p

11. A chaser fr'amehaving a head with notches, chasers occupying said notches, a V

clamping ring, and means for holding the clamping ring to the head, and shoulders on the ring at its inner face and on the frame at the other side of said notches, said shoulders engaging shoulders on the respective edges of the chasers to hold them in place at both edges.

12. The combination of a head having a sleeve, an oscillating driving device surrounding the sleeve and having a ratchet engagement therewith, said head having radial notches, chasers occupying said notches, a ring secured to the end of the head, and

means comprising a rib on said ring engag- IRA W. NONNEMAN. 

